Rare New leaves

Hey, buddy! 👋😇 Such leaf finger deformities indicate a phosphorus deficiency in the plant's nutrition! You're already in the 7th week of growth, just one more step and it will be flowering, it's currently in the pre-flower stage! You should have already increased the phosphorus content in your watering! For the soil, I recommend increasing the Mammoth P addition and setting it to 0.3ml/l Next week, make it 0.4ml/l After 2 weeks of flowering, make it 0.7ml/l After the middle of flowering, make it 1.1ml/l In the last week of ripening, before flush, make the Mammoth P addition 0.3ml/l 😇👌 Good luck, bro! ✊😇

Hello I've gotten twisty leaves from a few things like soil/root problems or sometimes excessive wind. You can look into your soils wet/dry cycle to make sure there isn't any root irritation or if they need a transplant from the roots being bound up. But when you have just one leaf doing it, especially a young leaf who's still growing you might not need to do anything other than let it grow. Your temp looks a little on the lower side but the plant overall is looking very healthy. Happy growing.